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參數資料
| 型號： | FX489 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GMSK Modem |
| 中文描述： | GMSK調制解調器 |
| 文件頁數： | 4/12頁 |
| 文件大小： | 106K |
| 代理商： | FX489 |
4
Application Information
XTAL
XTAL/CLOCK
ClkDivA
ClkDivB
RxDCacq
PLLacq
Doc1
Doc2
BT
Tx OUT
Tx ENABLE
Tx PS
Tx DATA
Rx DATA
Rx CLOCK
Tx CLOCK
Rx S/N
V
DD
V
DD
R
3
R
1
R
4
C
6
C
5
C
8
C
7
C
1
C
4
V
SS
V
BIAS
V
SS
V
SS
Rx PS
Rx FEEDBACK
Rx SIGNAL IN
Rx HOLD
XTAL
XTAL/CLOCK
1
2
V
SS
C
3
C
2
X
1
R
2
1
2
3
4
5
6
7
8
9
10
11
12
FX489P
24
23
22
21
20
19
18
17
16
15
14
13
C
4
C
5
C
6
C
7
C
8
X
1
100nF
1.0μF
22.0pF
15.0nF
15.0nF
Note 3
±20%
±20%
±20%
±20%
±20%
External Components
Component
R
1
R
2
R
3
R
4
C
1
C
2
C
3
Value
Note 1
1.0M
Note 2
100k
Note 1
33.0pF
33.0pF
Tolerance
±5%
±10%
±10%
±10%
±10%
±20%
±20%
Fig.2 External Components
Notes
1. The RC network formed by R
and C
is required
between the Tx Out pin and the input to the modulator.
This network, which can form part of any d.c. level
shifting and gain adjustment circuitry, forms an
important part of the transmit signal filtering. The ground
connection to the capacitor C
should be positioned to
give maximum attenuation of high-frequency noise into
the modulator.
The component values should be chosen so that the
product of the resistance (Ohms) and the capacitance
(Farads) is:
BT of 0.3 = 0.34/bit rate (bits/second)
BT of 0.5 = 0.22/bit rate (bits/second)
- with suitable values for common bit rates being:
R
1
C
1
8000 bits/sec
4800 bits/sec
9600 bits/sec
NOTE that in all cases, the value of R
should be not
less than 47.0k
and the calculated value of C
1
includes
BT = 0.3
BT = 0.5
BT = 0.5
91.0k
100k
47.0k
470pF
470pF
470pF
calculated parasitic (circuit) capacitances.
2. R
, R
4
and C
6
form the gain components for the Rx Input
signal.
R
should be chosen as required by the signal input
level.
3. The FX489 can operate correctly with Xtal/Clock
frequencies as detailed in Table 1.
Operation of this device without a Xtal or Clock input
may cause device damage.
相關PDF資料 |
PDF描述 |
|---|---|
| FX489DW | GMSK Modem |
| FX489P | GMSK Modem |
| FX501 | High-Current Switching Applications |
| FX502 | High-Current Switching Applications |
| FX504 | High-Current Switching Applications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FX489DW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GMSK Modem |
| FX489P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GMSK Modem |
| FX4A1-20P-1.27SV | 制造商:HRS 制造商全稱:HRS 功能描述:Stacking Height 5 to 11mm Half Pitch Connector |
| FX4A1-20P-1.27SV(71) | 功能描述:板對板與夾層連接器 20P STRT SMT HEADER NO LOC BOSS GLD PLT RoHS:否 制造商:JAE Electronics 系列:WP3 產品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點數量:50 排數:2 外殼材料:Plastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A |
| FX4A1-20P-1.27SV(99) | 功能描述:板對板與夾層連接器 20P STRT SMT HEADER NO LOC BOSS GLD PLT RoHS:否 制造商:JAE Electronics 系列:WP3 產品類型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點數量:50 排數:2 外殼材料:Plastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A |
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